My husband made a huge one using old countertop that has a cutout for the sewing machine. A lot larger than an acrylic ones. It is supported at the height of the machine by dowels. Works a lot better than the smaller extensions. Very little drag and easier to maneuver a huge quilt. Maybe you could contact a contractor that just remodeled a kitchen and has some old counter top. Store it under the bed when not in use. He has made a couple for other quilters